1288121407 has 2 divisors, whose sum is σ = 1288121408. Its totient is φ = 1288121406.

The previous prime is 1288121363. The next prime is 1288121413. The reversal of 1288121407 is 7041218821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1288121407 - 2¹⁵ = 1288088639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1288121437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644060703 + 644060704.

It is an arithmetic number, because the mean of its divisors is an integer number (644060704).

Almost surely, 2^1288121407 is an apocalyptic number.

1288121407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288121407 is an equidigital number, since it uses as much as digits as its factorization.

1288121407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 1288121407 is about 35890.4082868947. The cubic root of 1288121407 is about 1088.0585497682.

The spelling of 1288121407 in words is "one billion, two hundred eighty-eight million, one hundred twenty-one thousand, four hundred seven".